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High efficiency extraction method of T-acid mother liquor

A kind of acid mother liquor extraction technology, applied in the field of high-efficiency extraction of T acid mother liquor, to achieve effective separation and recycling, saving energy and production costs

Active Publication Date: 2015-12-09
JIANGXI MADE FINE CHEM IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, at this stage, many enterprises have no choice but to spray dry the mother liquor of T acid, so that the waste water becomes waste residue

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A kind of T acid mother liquor high-efficiency extraction method of the present embodiment comprises the following steps:

[0020] (1) Preparation of extractant: Measure 300ml of trioctyl, decanyl tertiary amine, 400ml of sulfonated kerosene, and 100ml of n-octanol, pour them into a 2000ml four-necked flask, and mix well.

[0021] (2) Extraction: Add 500ml of the collected T-acid mother liquor (COD78000mg / L, ammonium sulfate 30%) into the four-neck flask in step (1) and heat up and stir. At the same time, add 30-35g of sulfuric acid, the process temperature is 45°C, and stir After standing for 20 minutes, the layers were separated, the upper layer was the extract, and the lower layer was the inorganic salt phase.

[0022] (3) Stripping: After the lower layer of inorganic brine is separated, heat up the remaining extract to 50-55°C, start adding 25% sodium hydroxide, and measure the pH of the bottom organic aqueous phase. After the pH is 10-11, Stir for 20 minutes, let ...

Embodiment 2

[0024] The setting and working principle of this embodiment are the same as that of Embodiment 1, the difference is that:

[0025] (1) Preparation of extractant: Measure 400ml of tricapryl and decanyl tertiary amine, 400ml of sulfonated kerosene, and 100ml of n-octanol, pour them into a 2000ml four-necked flask, and mix well.

[0026] (2) Extraction: Add 500ml of the collected T-acid mother liquor into the four-necked flask in step (1) to heat up and stir, and at the same time add 40-44g of sulfuric acid, the process temperature is 45°C, stir for 20 minutes and then stand for stratification. The upper layer is Extract, the lower layer is the inorganic salt phase.

[0027] (3) Stripping: After the lower layer of inorganic brine is separated, heat up the remaining extract to 50-55°C, start adding 25% sodium hydroxide, and measure the pH of the bottom organic aqueous phase. After the pH is 10-11, Stir for 20 minutes, let stand for 1-1.5 hours and separate the oil and water.

Embodiment 3

[0029] The setting and working principle of this embodiment are the same as that of Embodiment 1, the difference is that:

[0030] (1) Preparation of extractant: Measure 500ml of tricapryl and decanyl tertiary amine, 400ml of sulfonated kerosene, and 100ml of n-octanol, pour them into a 2000ml four-necked flask, and mix well.

[0031] (2) Extraction: Add 500ml of the collected T-acid mother liquor into the four-necked flask in step (1) to heat up and stir, and at the same time add 50-55g of sulfuric acid, the process temperature is 45°C, stir for 20 minutes and then stand for stratification. The upper layer is Extract, the lower layer is the inorganic salt phase.

[0032] (3) Stripping: After the lower layer of inorganic brine is separated, heat up the remaining extract to 50-55°C, start adding 25% sodium hydroxide, and measure the pH of the bottom organic aqueous phase. After the pH is 10-11, Stir for 20 minutes, let stand for 1-1.5 hours and separate the oil and water.

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Abstract

The invention relates to a high efficiency extraction method of T-acid mother liquor, and belongs to the field of an H-acid production waste water treatment. Tri(octyl-decyl)amine, sulfonated kerosene and n-octyl alcohol are respectively measured and uniformly mixed for obtaining an extractant, the extractant is thrown into the T-acid mother liquor, a heating stirring is carried out, simultaneously sulfuric acid is added, after stirring, standing and layering, the upper layer is an extract, and lower layer is an inorganic salt water phase; after the lower layer inorganic salt water phase is separated, the upper layer extract is heated, sodium hydroxide is added, after stirring and standing, the oil and water separation is carried out. The invention is applied into the H-acid production, thereby avoiding generation of solid waste with simple operation and effectively reducing the production cost.

Description

technical field [0001] The invention relates to a high-efficiency extraction method of T-acid mother liquor, which belongs to the technical field of H-acid production. Background technique [0002] H acid is an important intermediate in the chemical industry of naphthalene dyes. The traditional H acid production process has produced a large number of T acid mother liquors. The T acid mother liquor produced per ton of H acid is about 10 tons, and the COD of T acid mother liquor is 80000mg / L, the salt content (only ammonium sulfate) is above 30%, which is extremely difficult to handle. At present, when most production enterprises treat T-acid mother liquor, although they can also use multi-effect evaporation or extraction process, the final solid waste mainly composed of ammonium sulfate still cannot meet the industrial-grade standard, and the cost of extracting T-acid mother liquor Higher, every 10m 3 The raw material treatment of T acid mother liquor is more than 2,000 yu...

Claims

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Application Information

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IPC IPC(8): C02F1/26C02F103/34
Inventor 袁玉明张爱兵莫小平闵阿陆
Owner JIANGXI MADE FINE CHEM IND
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